With higher D levels, if you do get infected, you are much less likely to get severely ill, and more likely to be able to breathe on your own.

With higher D levels, if you do get infected, you are probably also less likely to spread the virus to others."

Hey, I don't know about you, but I'm all for breathing on my own. He also shows the specific physiological benefits of different levels:

Prevent rickets 10 ng/dl

Suppress parathyroid hormone 20 ng/dl

Maximize intestinal calcium absorption 34 ng/dl

Maximize muscle strength 50 ng/dl

The blog is also a great resource for anyone interested in the concept of paleo nutrition. It's far more science-based than most paleo blogs.

Also, I've found that Carlson's makes Vitamin D3 drops (in coconut oil). It has no taste and solves the problem of trying to get your toddler to swallow a gel cap. You can even add it to food if need be.